As the leading automatic tire inflation system in North America, the Meritor Tire Inflation System (MTIS™) with ThermALERT™ Standard is designed to be compatible with a wide range of axle and wheel-end component combinations. To help ensure that you specify the correct MTIS kit for an application, Meritor is pleased to provide the following guidelines to assist in product selection, which depends on the type of axles and wheel-ends on the trailer.
Specify a New or Retrofit Kit
Please determine following information to allow selection of the proper kit:
- Axle Manufacturer
- Spindle Series (“N” - Tapered, Or “P” - Straight)
- Dual Tires or Single Tire (SS)
- Wheel Size
- Number of Axles (Single, Tandem, Tridem, Quad)
- Hub Material - Ductile Iron or Aluminum and if it’s a ConMet PreSet design
- Appropriate Style of Hubcap
- Desired Cold Tire Pressure Setting
- Hubcap Type or Wheel End Lubrication Type
* NOTE:
Hubcaps may be included in kits or may be ordered separately. When ordering hubcaps separately, please provide appropriate style of hubcap and wheel end lubrication type if part number is not known.
* NOTE:
All retrofit kits are pre-set to 100psi. Please consult the MTIS Maintenance and Installation Manual (MM14P) for additional details.
* NOTE: For part number nomenclature explanation, see Table 2.
For Installation on Meritor TN/TQ Axles with Tapered Spindles
Specify kits having thru-tee assemblies with 3.5" long tubes when the trailer axles are equipped with either ductile iron or aluminum hubs. The hubs can be ConMet PreSet or other designs.
For Installation on Meritor TP Axles with Parallel Spindles
Specify kits having thru-tee assemblies with 4" long tubes when the trailer axles are equipped with ductile iron hubs except for ConMet hubs. If the trailer axles are equipped with aluminum or ConMet ductile iron hubs, specify an MTIS kit containing thru-tees with 5" long tubes.
Determine the type of kit you need.
MTIS Kit Part Numbers “Partial” MTIS Kits
“Partial” kits do not include spindle press plugs or stators. Partial kits are for installation on axles which have been prepped for MTIS at the production factory. (The spindle press plugs and stators have been installed on the axles.)
Note that the standard thru-tee length for partial MTIS kits is 3.5". If you require a longer thru-tee length, please inform your Meritor customer service representative when placing your MTIS order. When a length other than the standard 3.5" is specified, it will be stated in the kit part number. Refer to the following table for examples.
Trailer Axle and Hub Types |
Recommended Thru-tee Tube Length |
MTIS with ThermALERT™ Partial Kit Part Number H2712 Family |
TN axle with ductile iron hubs including ConMet PreSet or PreSet Plus |
3.5" |
H2712-22 |
TN axle with aluminum hubs including ConMet PreSet or PreSet Plus |
3.5" |
H2712-22 |
TP axle with ductile iron hubs |
4" |
H2712-22-4 |
TP axle with aluminum hubs |
5" |
H2712-22-5 |
TP axle with ConMet PreSet or PreSet Plus hubs |
5" |
H2712-22-5 |
“Full” MTIS Kits
“Full” MTIS kits and the other components as shown in Figure 5 are for installation on axles which have not been prepped for MTIS. These kits include spindle press plugs and stators. The standard thru-tee tube length for a full MTIS kit is based on the spindle type for which the kit is intended. For example, a full MTIS kit for a TN axle will have a standard thru-tee tube length of 3.5" while a full MTIS kit for a TP axle will have a standard thru-tee tube length of 4".
If you require a thru-tee length longer than the standard length, please inform your Meritor customer service representative when placing your MTIS order. When a length other than the standard is specified, it will be stated in the kit part number. Refer to the tables below for the axle type and product codes.
Spindle Style |
Product Code |
Axle Series |
Straight Spindle |
H1955 Series |
ProPar™ (Square Axle) |
Straight Spindle |
H1975 Series |
Meritor TP, TB (1998 and later), WP, Hendrickson® HP, SAF Holland® Ingersoll® F24 - 2.75" |
Straight Spindle |
H1995 Series |
Meritor TP MTec6 axles |
Straight Spindle |
H2405 Series |
Meritor TB (before 1998) - 2.95" |
Straight Spindle |
H2595 Series |
Sudisa® 12-R |
Straight Spindle |
H2815 Series |
Dana® P22, Hendrickson HP - 2.50" |
Straight Spindle |
61151 Series |
Meritor TL - 2.50" |
Tapered Spindle |
31924 Series |
Ingersoll® F22 - 1.50 inch (manufactured prior to Aug. 2017) |
Tapered Spindle |
31935 Series |
Ingersoll® F22 (For axles manufactured prior to August 2017.) |
Tapered Spindle |
H1965 Series |
Meritor TN/TQ, Ingersoll F22 axles (manufactured in or after August 2017), RN/RQ, Hendrickson HN, Dana/Eaton D22 Hollow Spindle |
Tapered Spindle |
H1985 Series |
Meritor TN MTec6 axles |
Tapered Spindle |
32375 Series |
Holland Trade Note: check diameter of opening to determine kit. |
Tapered Spindle |
32645 Series |
Sudisa 11-M |
Examples of standard kits. Please contact your Meritor representative for assistance to obtain the correct kit for the application.
Axle/Spindle Style |
Hub Type |
Recommended Thru-Tee Tube Length |
MTIS with Thermalert Part Number |
TN/TQ, HN |
Ductile Iron |
3.5" |
H1965-22 |
TN/TQ, HN |
Aluminum |
3.5" |
H1965-22 |
TP, WP, HP (2.75" bore) |
Ductile Iron |
4" |
H1965-22 |
TP, WP, HP (2.75" bore) |
Aluminum |
5" |
H1975-22-5 |
TP |
ConMet PreSet or PreSet Plus |
5" |
H1975-22-5 |
MTIS Kit Part Number Structure
In this example, we will use the Meritor TN/TQ, RN/RQ, Hendrickson HN, Dana/Eaton D22 Hollow Spindle with Tandem Axles, Dual Dynamics Hubcaps and Check Port Hoses.
NOTE: For non ThermALERT-equipped replace “H” prefix with “6” prefix for Series part #.
H1965-22-D1-CP
Series/Axle Type |
No. Axles |
Thru-Tee Tube Change |
Tires |
Options |
Hoses |
H1965 |
22 |
|
|
D1 |
CP |
Per Catalog Tables |
11 = Single Axle
22 = Tandem Axle
33 = Tridem Axle
44 = Quad Axle
|
BLANK = All standard configurations
5 = TP with ConMet Iron or Aluminum Hubs
|
BLANK = Dual
S = Single
|
D1 = Dual Dynamics™ 6H, 5.5" oil
D2 = Dual Dynamics 6H, 5.5" grease
D3 = Dual Dynamics screw-on oil
D4 = Dual Dynamics screw-on grease
D5 = Dual Dynamics 6H, 6.75" oil
D6 = Dual Dynamics 6H, 6.75" grease
OTHER = OE Options as defined
|
BLANK = Standard
CP = Auxiliary Check Port
|